Partial disk failures and improved storage resiliency

Details Partial disk failures and improved storage resiliency Partial disk failures and improved storage resiliency

2008-04-18

2011-11-01

Negron, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S053000, C711S114000, C714S006210

Reexamination Certificate

active

08049980

ABSTRACT:
A mass data storage system including a hard disk drive comprising heads and platter surfaces determines when a head of the disk is faulty and the disk continues to operate as a partially failed disk with respect to the remaining heads which are not faulty. A striped parity disk array comprises disks capable of operating as partially failed disks allows copying of data from the platter surfaces not associated with a faulty head of a partially failed disk to a spare disk which reduces the amount of data that must be rebuilt in the rebuild process, thereby reducing the amount of time the array spends in degraded mode exposed to a total loss of data caused by a subsequent disk failure.

REFERENCES:
patent: 7079341 (2006-07-01), Kistler et al.
patent: 7089448 (2006-08-01), Hinshaw et al.
patent: 7359134 (2008-04-01), Komatsu

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